title: (E)-1-[(2,4,6-Tri-bromo-phen-yl)diazen-yl]naphthalen-2-ol.
abstract: The title azo mol-ecule, C16H9Br3N2O, adopts a trans conformation with respect to the azo N=N double bond. An intra-molecular O-H⋯N hydrogen bond forms an S(6) ring motif. The dihedral angle between the naphthalene ring system and the benzene ring is 33.80 (16)°. In the crystal, mol-ecules are stacked in columns along the a axis by π-π inter-actions [centroid-centroid distances = 3.815 (3) and 3.990 (3) Å].
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale (CHEMS), Faculté des Sciences Exactes, Département de Chimie, Université Constantine 1, 25000 Constantine, Algeria.
authors.forename: Souheyla
authors.initials: S
authors.lastname: Chetioui
authors.forename: Issam
authors.initials: I
authors.lastname: Boudraa
authors.forename: Sofiane
authors.initials: S
authors.lastname: Bouacida
authors.forename: Abdelkader
authors.initials: A
authors.lastname: Bouchoul
authors.forename: Salah Eddine
authors.initials: SE
authors.lastname: Bouaoud